Corner shelf



FIG. 1 is a Perspective view of a corner shelf showing my new design;

FIG. 2 is other perspective view thereof;

FIG. 3 is a Front view thereof;

FIG. 4 is a Back view thereof;

FIG. 5 is a Right-side view thereof;

FIG. 6 is a Left-side view thereof;

FIG. 7 is a Top view thereof; and,

FIG. 8 is a Bottom view thereof.

The broken lines are only for environmental purposes and form no part of the claimed design. 

CLAIM I claim the ornamental design for a corner shelf, as shown and described. 